Curl bars may be labeled as standard or Olympic, which refers to what size plate they hold. Standard curl bars hold standard weight plates, which have a 1-inch hole in the center.

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That tool is the EZ curl bar, which has wrist-friendly curves that make it easier to grip than traditional straight bars—and has some underrated uses, too.

A new angle on curls Originally designed for hair stylists to ease the pressure on wrists, elbows and shoulders, the Hot Tools Curl Bar is completely unique in its design. Shaped like the number ...